Delivering higher resolution and lower cost compared to previous generation sensors, the Optoelectronics group of Vishay Intertechnology, Inc. has introduced two new fully integrated automotive-grade proximity sensors with high resolution up to 20 µm for force sensing applications. Each sensor combines a photodiode, amplifier, and ADC circuitry in a 4 × 2.36 mm surface-mount package with a low 0.75-mm profile.
The VCNL3030X01 features an onboard infrared emitter (IRED) while the VCNL3036X01 is designed to be used with up to three external IREDs for greater design flexibility. An onboard driver with internal logic is provided, said Vishay. These devices can be used in a range of applications, including automotive, consumer, smart home, industrial, office, and toy products.
When used for force sensing applications in steering wheel controls, laptop smart power buttons and multi-force trackpads, and touchpads for IoT devices and kitchen appliances, the VCNL3030X01 and VCNL3036X01 prevent false triggers and even allow users to wear gloves, said Vishay.
The AEC-Q101 qualified devices support the I²C bus communication interface, while their programmable interrupt function allows designers to specify high and low thresholds, which reduces the continuous communication with the microcontroller.
With selectable 12-bit and 16-bit outputs, the proximity sensors use intelligent cancellation to eliminate cross-talk, said Vishay, while a smart persistence scheme ensures accurate sensing and faster response time. The VCNL3030X01’s emitter wavelength peaks at 940 nm and has no visible “red-tail.”
Other key features include IRED/LED pulse current of 200 mA, a supply voltage range of 2.5 V to 3.6 V, and an I²C bus voltage range from 1.8 V to 5.5 V. The sensors can fine-tune the current for short displacements in force sensing applications.
The proximity sensors are RoHS-compliant, halogen-free, and Vishay Green. Samples and production quantities are available, with lead times of six to 12 weeks for large orders. Pricing for U.S. delivery starts at $0.75 each in quantities of 5,000.
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